I looked up the Google drive pricing and the costs increase quickly over that 100GB level. I'm going to use 3TB of data for my example because that is approximately the amount of data I would be backing up at work. The cost for Google Drive would be the $99 a month 10TB plan, Amazon Glacier is $21.51 a month. This is before you get into things like having the enterprise AWS ecosystem with IAM versus a single user Gmail account. Remember I am only talking about retrieval in the case of a catastrophic failure, the data is already backed up elsewhere. As long as I can manage to go a year without destroying all my backups Glacier comes out on top over Drive even taking into account the retrieval fees. In the best case scenario I never ever retrieve that data.